Home / 128,682.23-177,581.50-71,330.20

Finding the Fourth Proportional to 128,682.23, 177,581.50 and 71,330.20

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Solution

The fourth proportional to 128,682.23, 177,581.50 and 71,330.20 is: 98,435.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,682.23 : 177,581.50 = 71,330.20 : x
  2. Step 2: Convert to fraction form
    128,682.23/177,581.50 = 71,330.20/x
  3. Step 3: Cross multiply
    128,682.23x = 177,581.50 × 71,330.20
  4. Step 4: Simplify right side
    128,682.23x = 12,666,923,762.87
  5. Step 5: Solve for x
    x = 12,666,923,762.87/128,682.23
  6. Step 6: Final answer
    x = 98,435.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.